实际的开发中，我们会经常遇到数据的转化的需要，将Excel中的数据转入到SQL中，或将SQL在数据库表中的数据导入到Excel中。代码如下：
Code
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using GemBox.ExcelLite;
using System.Data.SqlClient;
using System.Data.OleDb;
using System.Collections;
using System.IO;
namespace Encryption
{
public partial class ExcelDemo : Form
{
private static string _filePath = string.Empty;
public ExcelDemo()
{
InitializeComponent();
BindUser();
}
///
///
private void BindUser()
{
string sql = "select * from Users";
DataTable dt = DbHelperSQL.QueryTb(sql);
dataGridView1.DataSource = dt;
}
///
///
private void btnExcelin_Click(object sender, EventArgs e)
{
ExcelFile excelFile = new ExcelFile();
ExcelWorksheet sheet = excelFile.Worksheets.Add("Users");
int columns = dataGridView1.Columns.Count;
int rows = dataGridView1.Rows.Count;
for (int j = 0; j
/// 选择要向SQL数据库中导入数据的Excel文件
///
private void btnChoose_Click(object sender, EventArgs e)
{
using (OpenFileDialog dialog = new OpenFileDialog())
{
dialog.Multiselect = true;
if (dialog.ShowDialog() == DialogResult.OK)
{
try
{
txtPath.Text = dialog.FileName;
}
catch { }
}
}
}
///
///
private void btnExcelout_Click(object sender, EventArgs e)
{
DataSet ds=ImportFromExcel(txtPath.Text.Trim());
DataTable dt = ds.Tables[0];
try
{
string strInsertComm;
for (int i = 0; i
{
strInsertComm += ",‘" + dt.Rows[i][j].ToString().Trim() + "‘";
}
else
{
strInsertComm += "‘" + dt.Rows[i][j].ToString().Trim() + "‘";
}
}
strInsertComm += ")";
DbHelperSQL.ExecuteSql(strInsertComm);
}
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
}
#region Excel导入SQL数据库
///
///
///
public static ArrayList GetExcelTables(string FilePath)
{
//将Excel架构存入数据里
System.Data.DataTable dt = new System.Data.DataTable();
ArrayList TablesList = new ArrayList();
if (File.Exists(FilePath))
{
using (OleDbConnection conn = new OleDbConnection("Provider=Microsoft.Jet." +
"OLEDB.4.0;Extended Properties=\"Excel 8.0\";Data Source=" + FilePath))
{
try
{
conn.Open();
dt = conn.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, new object[] { null, null, null, "TABLE" });
}
catch (Exception exp)
{
MessageBox.Show(exp.Message);
}
//获取数据表个数
int tablecount = dt.Rows.Count;
for (int i = 0; i
/// 导入Excel数据表至DataTable（第一行作为表头）
///
///
public static System.Data.DataSet FillDataSet(string FilePath)
{
if (!File.Exists(FilePath))
{
throw new Exception("Excel文件不存在！");
}
ArrayList TableList = new ArrayList();
TableList = GetExcelTables(FilePath);
if (TableList.Count
/// Excel导入数据库
///
///
public static DataSet ImportFromExcel(string FilePath)
{
return FillDataSet(FilePath);
}
#endregion
}
}
数据从SQL到Excel中利用了GemBox.ExcelLite.dll，网上可以下载。
代码很简单，希望大家有什么更好的方法，分享出来啊！有的时候可能需要对导入导出的数据加密，只需要定义一个加密函数，依次的对数据加密就ok了。